When We Believed in Mermaids: A Novel

By Barbara O'Neal

An Amazon Charts, Washington Post, Wall Street Journal, and USA Today bestseller.

From the author of The Art of Inheriting Secrets comes an emotional new tale of two sisters, an ocean of lies, and a search for the truth.

Her sister has been dead for fifteen years when she sees her on the TV news...

Josie Bianci was killed years ago on a train during a terrorist attack. Gone forever. It's what her sister, Kit, an ER doctor in Santa Cruz, has always believed. Yet all it takes is a few heart-wrenching seconds to upend Kit's world. Live coverage of a club fire in Auckland has captured the image of a woman stumbling through the smoke and debris. Her resemblance to Josie is unbelievable. And unmistakable. With it comes a flood of emotions--grief, loss, and anger--that Kit finally has a chance to put to rest: by finding the sister who's been living a lie.

After arriving in New Zealand, Kit begins her journey with the memories of the past: of days spent on the beach with Josie. Of a lost teenage boy who'd become part of their family. And of a trauma that has haunted Kit and Josie their entire lives.

Now, if two sisters are to reunite, it can only be by unearthing long-buried secrets and facing a devastating truth that has kept them apart far too long. To regain their relationship, they may have to lose everything.

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Published Jul 16, 2019

352 pages

Average rating: 7.47

410 RATINGS

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Community Reviews

What Bookclubbers are saying about this book

✨ Summarized by Bookclubs AI

Readers say *When We Believed in Mermaids* is an emotionally rich novel celebrated for its heartfelt exploration of family, love, and letting go of th...

K Olson
Jan 14, 2025
6/10 stars
This book was more chick-lit and romance than the mystery I thought it would be, so in that regard I was disappointed. Would make a good beach read.
KikiStoneCreek
Jun 03, 2023
10/10 stars
It's been a long time since a book made me cry...

Or stay up all night to finish reading it! The characters in this book are so perfectly drawn that you feel what they're feeling, and see how they're seeing their life and the lives of those they love and have loved in the past.

This book makesi it onto my "highly recommended" list, the first for 2021!
Elizabeth Richards
Jun 18, 2026
8/10 stars
Hauntingly Beautiful

A very heartwarming and painful story at the same time..a story of trauma, survival, love, and hope. Family first, always.
Lee Ann
Jun 18, 2026
10/10 stars
Wonderful Story

This is a wonderful story of love, family, and letting go of the past. The characters are well written and relatable. Kit's sister has been dead for 15 years, or so her and her mother thought, until one day they see her on the news. Kit sets off on an adventure to find her sister and finds more than she bargained for along the way.
ellieclaire3194
Feb 25, 2026
1/10 star
Worst book I’ve ever read. She strayed from the plot. Characters were god awful. Writing was terrible.

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